Investments in Qualified Affordable Housing Partnerships, Tax Credit and Other Investments, Net and Variable Interest Entities (Investments in Tax Credit and Other Investments, Net) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Investments in Qualified Affordable Housing Partnerships, Tax Credit and Other Investments, Net and Variable Interest Entities [Abstract]
Investments in tax credit and other investments, net	$ 231,635	$ 224,551
Investments in Tax Credit and Other Investments, Net
Amortization of tax credit and other investments	89,628	87,950	$ 83,446
Investments in Tax Credit and Other Investments, Net
Investments in Tax Credit and Other Investments, Net
Accrued expenses and other liabilities - Unfunded commitments	$ 80,228	$ 113,372